Power Cable Partial Breakage Test 1

[VLFit]

Some countries cable testing standards for Mining applications call for a "partial breakage" test of the conductor. A 10% breakage, or deterioration must be measurable. What instrument is or can be used for this test? A resistance measurement won't work, using the Ohm Check Concentric Neutral Tester wont do it, nor will a tdr. A 1000' cable can have 50% of its core broken over ten feet and the small local area change of resistance and continuity wont be discernable in the measurement over the entire length of the cable. Maybe a combination of the Ohm Check and a tdr, the way Concentric Neutrals should be tested, would do it, but probably not. Any help?
Thanks

 

[VLFit]

I have found my answer, sent in by catserveng on the Distribution and Transmission Forum. Thank you for that. Adret of South Africa produces an instrument designed for this purpose. the link is below. On to the next project.

http://adrettest.com/wp-content/uploads/2020/03/PB201.pdf